Pollen + air-quality with category words API

Pollen and air-quality snapshot for a city or coordinates from Open-Meteo, returning current grass/birch/alder/mugwort/ragweed/olive pollen with low/moderate/high/very-high bands, PM2.5/PM10/ozone, the European AQI translated to its category word, and the dominant pollen. Answers 'what's the pollen count here', 'is the air quality bad today', 'which pollen is highest right now', 'AQI and allergy outlook for this city'.

Price$0.01per request

MethodPOST

Route/v1/data/pollen

StatusLive

MIME typeapplication/json

Rate limit60/minute

Cache3600s public

datapollenallergyair-qualityaqipm2.5open-meteohayfever

API URLhttps://x402.hexl.dev/v1/data/pollen

Integration docs

Example request

{
  "city": "Berlin"
}

Example response

{
  "location": "Berlin, Germany",
  "latitude": 52.52,
  "longitude": 13.405,
  "observedAt": "2026-06-03T12:00",
  "europeanAqi": 35,
  "aqiCategory": "fair",
  "pm2_5": 9.1,
  "pm10": 18.4,
  "ozone": 72,
  "pollen": {
    "grass": {
      "grainsPerM3": 12,
      "level": "moderate"
    },
    "birch": {
      "grainsPerM3": 55,
      "level": "very high"
    }
  },
  "dominantPollen": {
    "type": "birch",
    "grainsPerM3": 55
  }
}

Input schema

{
  "type": "object",
  "required": [],
  "properties": {
    "city": {
      "type": "string",
      "examples": [
        "Berlin"
      ]
    },
    "latitude": {
      "type": "number",
      "examples": [
        52.52
      ]
    },
    "longitude": {
      "type": "number",
      "examples": [
        13.405
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}